diff --git a/src/web/public/app.js b/src/web/public/app.js
index 8dd00d49..acfac800 100644
--- a/src/web/public/app.js
+++ b/src/web/public/app.js
@@ -249,6 +249,9 @@ const _SSE_HANDLER_MAP = [
   [SSE_EVENTS.ORCHESTRATOR_TASK_FAILED, '_onOrchestratorTaskFailed'],
   [SSE_EVENTS.ORCHESTRATOR_COMPLETED, '_onOrchestratorCompleted'],
   [SSE_EVENTS.ORCHESTRATOR_ERROR, '_onOrchestratorError'],
+
+  // Clipboard
+  [SSE_EVENTS.CLIPBOARD_WRITE, '_onClipboardWrite'],
 ];
 
 
diff --git a/src/web/public/constants.js b/src/web/public/constants.js
index dd954e1d..25566321 100644
--- a/src/web/public/constants.js
+++ b/src/web/public/constants.js
@@ -292,6 +292,9 @@ const SSE_EVENTS = {
   ORCHESTRATOR_COMPLETED: 'orchestrator:completed',
   ORCHESTRATOR_ERROR: 'orchestrator:error',
 
+  // Clipboard
+  CLIPBOARD_WRITE: 'clipboard:write',
+
   // Cases
   CASE_CREATED: 'case:created',
   CASE_LINKED: 'case:linked',
diff --git a/src/web/public/panels-ui.js b/src/web/public/panels-ui.js
index 00cd7bca..81bc4e94 100644
--- a/src/web/public/panels-ui.js
+++ b/src/web/public/panels-ui.js
@@ -3246,4 +3246,68 @@ Object.assign(CodemanApp.prototype, {
       }
     }
   },
+
+  // ─── Clipboard ──────────────────────────────────────────────────────────────
+
+  async _onClipboardWrite(data) {
+    const text = data?.text;
+    if (typeof text !== 'string') return;
+    try {
+      await navigator.clipboard.writeText(text);
+      this.showToast(`Copied to clipboard (${text.length} chars)`, 'success');
+    } catch {
+      this._showClipboardFallback(text);
+    }
+  },
+
+  _showClipboardFallback(text) {
+    const overlay = document.createElement('div');
+    overlay.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:10000;display:flex;align-items:center;justify-content:center';
+
+    const modal = document.createElement('div');
+    modal.style.cssText = 'background:#1e1e2e;border:1px solid #444;border-radius:8px;padding:16px;max-width:600px;width:90%;max-height:60vh;display:flex;flex-direction:column;gap:12px';
+
+    const header = document.createElement('div');
+    header.style.cssText = 'display:flex;justify-content:space-between;align-items:center';
+    const title = document.createElement('span');
+    title.style.cssText = 'color:#cdd6f4;font-weight:600';
+    title.textContent = 'Clipboard (browser blocked auto-copy)';
+    const closeBtn = document.createElement('button');
+    closeBtn.style.cssText = 'background:none;border:none;color:#cdd6f4;font-size:18px;cursor:pointer';
+    closeBtn.textContent = '\u00d7';
+    header.appendChild(title);
+    header.appendChild(closeBtn);
+
+    const textarea = document.createElement('textarea');
+    textarea.readOnly = true;
+    textarea.style.cssText = 'background:#181825;color:#cdd6f4;border:1px solid #555;border-radius:4px;padding:8px;font-family:monospace;font-size:13px;resize:none;height:200px;width:100%';
+    textarea.value = text;
+
+    const copyBtn = document.createElement('button');
+    copyBtn.style.cssText = 'background:#89b4fa;color:#1e1e2e;border:none;border-radius:4px;padding:8px 16px;cursor:pointer;font-weight:600';
+    copyBtn.textContent = 'Copy to Clipboard';
+
+    modal.appendChild(header);
+    modal.appendChild(textarea);
+    modal.appendChild(copyBtn);
+    overlay.appendChild(modal);
+    document.body.appendChild(overlay);
+
+    copyBtn.onclick = async () => {
+      try {
+        await navigator.clipboard.writeText(text);
+        this.showToast('Copied to clipboard', 'success');
+        overlay.remove();
+      } catch {
+        textarea.select();
+        document.execCommand('copy');
+        this.showToast('Copied (fallback)', 'success');
+        overlay.remove();
+      }
+    };
+
+    const close = () => overlay.remove();
+    closeBtn.onclick = close;
+    overlay.onclick = (e) => { if (e.target === overlay) close(); };
+  },
 });
diff --git a/src/web/routes/clipboard-routes.ts b/src/web/routes/clipboard-routes.ts
new file mode 100644
index 00000000..f36b87b6
--- /dev/null
+++ b/src/web/routes/clipboard-routes.ts
@@ -0,0 +1,24 @@
+/**
+ * @fileoverview Clipboard routes.
+ * Accepts text via POST and broadcasts to connected browsers for clipboard write.
+ */
+
+import { FastifyInstance } from 'fastify';
+import { SseEvent } from '../sse-events.js';
+import type { EventPort } from '../ports/index.js';
+
+export function registerClipboardRoutes(app: FastifyInstance, ctx: EventPort): void {
+  app.post('/api/clipboard', async (req) => {
+    const body = req.body as { text?: string; sessionId?: string };
+    const text = body?.text;
+    if (typeof text !== 'string' || text.length === 0) {
+      return { success: false, error: 'Missing or empty "text" field' };
+    }
+    ctx.broadcast(SseEvent.ClipboardWrite, {
+      text,
+      sessionId: body.sessionId ?? null,
+      timestamp: Date.now(),
+    });
+    return { success: true };
+  });
+}
diff --git a/src/web/routes/index.ts b/src/web/routes/index.ts
index 8603528e..2c2eead1 100644
--- a/src/web/routes/index.ts
+++ b/src/web/routes/index.ts
@@ -15,4 +15,5 @@ export { registerRespawnRoutes } from './respawn-routes.js';
 export { registerRalphRoutes } from './ralph-routes.js';
 export { registerPlanRoutes } from './plan-routes.js';
 export { registerOrchestratorRoutes } from './orchestrator-routes.js';
+export { registerClipboardRoutes } from './clipboard-routes.js';
 export { registerWsRoutes } from './ws-routes.js';
diff --git a/src/web/server.ts b/src/web/server.ts
index 5b2c7e96..0ccb3df6 100644
--- a/src/web/server.ts
+++ b/src/web/server.ts
@@ -112,6 +112,7 @@ import {
   registerRespawnRoutes,
   registerRalphRoutes,
   registerPlanRoutes,
+  registerClipboardRoutes,
   registerOrchestratorRoutes,
   registerWsRoutes,
 } from './routes/index.js';
@@ -650,6 +651,7 @@ export class WebServer extends EventEmitter {
     registerRespawnRoutes(this.app, ctx);
     registerRalphRoutes(this.app, ctx);
     registerPlanRoutes(this.app, ctx);
+    registerClipboardRoutes(this.app, ctx);
     registerOrchestratorRoutes(this.app, ctx);
     registerWsRoutes(this.app, ctx);
   }
diff --git a/src/web/sse-events.ts b/src/web/sse-events.ts
index d83893fa..b6c8d7a7 100644
--- a/src/web/sse-events.ts
+++ b/src/web/sse-events.ts
@@ -319,6 +319,11 @@ export const OrchestratorCompleted = 'orchestrator:completed' as const;
 /** Orchestrator error. */
 export const OrchestratorError = 'orchestrator:error' as const;
 
+// ─── Clipboard ──────────────────────────────────────────────────────────────
+
+/** Clipboard content pushed to browser. */
+export const ClipboardWrite = 'clipboard:write' as const;
+
 // ─── Cases ───────────────────────────────────────────────────────────────────
 
 /** New case directory created. */
@@ -486,6 +491,9 @@ export const SseEvent = {
   OrchestratorCompleted,
   OrchestratorError,
 
+  // Clipboard
+  ClipboardWrite,
+
   // Cases
   CaseCreated,
   CaseLinked,